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<a href="01259.html" target="topic">System Service Libraries Help</a> &gt; <a href="00735.html" target="topic">File System Service Library Help</a> &gt; <a href="00736.html" target="topic">Library Interface</a></div>
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MPLAB Harmony Core Help</div>
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Library Interface</div>
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This section describes the APIs of the File System Service Library.&nbsp;</p>
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Refer to each section for a detailed description.</p></div>
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a) File and Directory Operation Functions</div>
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Name&nbsp;</div></td><td class="Element204" valign="top" width="65%">
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Description&nbsp;</div></td></tr><tr>
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<a href="00978.html" target="topic">SYS_FS_FileOpen</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Opens a file.&nbsp;</div></td></tr><tr>
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<a href="00970.html" target="topic">SYS_FS_FileClose</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Closes a file.&nbsp;</div></td></tr><tr>
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<a href="00969.html" target="topic">SYS_FS_FileCharacterPut</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Writes a character to a file.&nbsp;</div></td></tr><tr>
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<a href="00975.html" target="topic">SYS_FS_FileEOF</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Checks for end of file.&nbsp;</div></td></tr><tr>
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<a href="00976.html" target="topic">SYS_FS_FileError</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Returns the file specific error.&nbsp;</div></td></tr><tr>
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<a href="00977.html" target="topic">SYS_FS_FileNameGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Reads the file name.&nbsp;</div></td></tr><tr>
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<a href="00979.html" target="topic">SYS_FS_FilePrintf</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Writes a formatted string into a file.&nbsp;</div></td></tr><tr>
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<a href="00980.html" target="topic">SYS_FS_FileRead</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Read data from the file.&nbsp;</div></td></tr><tr>
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<a href="00981.html" target="topic">SYS_FS_FileSeek</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Moves the file pointer by the requested offset.&nbsp;</div></td></tr><tr>
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<a href="00982.html" target="topic">SYS_FS_FileSize</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Returns the size of the file in bytes.&nbsp;</div></td></tr><tr>
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<a href="00983.html" target="topic">SYS_FS_FileStat</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets file status.&nbsp;</div></td></tr><tr>
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<a href="00984.html" target="topic">SYS_FS_FileStringGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Reads a string from the file into a buffer.&nbsp;</div></td></tr><tr>
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<a href="00985.html" target="topic">SYS_FS_FileStringPut</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Writes a string to a file.&nbsp;</div></td></tr><tr>
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<a href="00986.html" target="topic">SYS_FS_FileSync</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Flushes the cached information when writing to a file.&nbsp;</div></td></tr><tr>
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<a href="00987.html" target="topic">SYS_FS_FileTell</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Obtains the file pointer position.&nbsp;</div></td></tr><tr>
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<a href="00988.html" target="topic">SYS_FS_FileTestError</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Checks for errors in the file.&nbsp;</div></td></tr><tr>
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<a href="00989.html" target="topic">SYS_FS_FileTruncate</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Truncates a file&nbsp;</div></td></tr><tr>
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<a href="00990.html" target="topic">SYS_FS_FileWrite</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Writes data to the file.&nbsp;</div></td></tr><tr>
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<a href="00901.html" target="topic">SYS_FS_DirectoryMake</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Makes a directory.&nbsp;</div></td></tr><tr>
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<a href="00902.html" target="topic">SYS_FS_DirOpen</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Open a directory&nbsp;</div></td></tr><tr>
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<a href="00899.html" target="topic">SYS_FS_DirClose</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Closes an opened directory.&nbsp;</div></td></tr><tr>
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<a href="00903.html" target="topic">SYS_FS_DirRead</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Reads the files and directories of the specified directory.&nbsp;</div></td></tr><tr>
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<a href="00904.html" target="topic">SYS_FS_DirRewind</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Rewinds to the beginning of the directory.&nbsp;</div></td></tr><tr>
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<a href="00905.html" target="topic">SYS_FS_DirSearch</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Searches for a file or directory.&nbsp;</div></td></tr><tr>
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<a href="00900.html" target="topic">SYS_FS_DirectoryChange</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Changes to a the directory specified.&nbsp;</div></td></tr><tr>
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<a href="00898.html" target="topic">SYS_FS_CurrentWorkingDirectoryGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the current working directory&nbsp;</div></td></tr><tr>
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<a href="00971.html" target="topic">SYS_FS_FileDirectoryModeSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Sets the mode for the file or directory.&nbsp;</div></td></tr><tr>
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<a href="00972.html" target="topic">SYS_FS_FileDirectoryRemove</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Removes a file or directory.&nbsp;</div></td></tr><tr>
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<a href="00973.html" target="topic">SYS_FS_FileDirectoryRenameMove</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Renames or moves a file or directory.&nbsp;</div></td></tr><tr>
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<a href="00974.html" target="topic">SYS_FS_FileDirectoryTimeSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Sets or changes the time for a file or directory.&nbsp;</div></td></tr><tr>
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<a href="00911.html" target="topic">SYS_FS_Error</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Returns the last error.&nbsp;</div></td></tr></table></div></div>
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b) General Operation Functions</div>
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<a href="01048.html" target="topic">SYS_FS_Initialize</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Initializes the file system abstraction layer (sys_fs layer).&nbsp;</div></td></tr><tr>
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<a href="01124.html" target="topic">SYS_FS_Tasks</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Maintains the File System tasks and functionalities.&nbsp;</div></td></tr><tr>
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<a href="01117.html" target="topic">SYS_FS_Mount</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Mounts the file system.&nbsp;</div></td></tr><tr>
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<a href="01137.html" target="topic">SYS_FS_Unmount</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Unmounts the file system.&nbsp;</div></td></tr><tr>
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<a href="00896.html" target="topic">SYS_FS_CurrentDriveGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the current drive&nbsp;</div></td></tr><tr>
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<a href="00897.html" target="topic">SYS_FS_CurrentDriveSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Sets the drive.&nbsp;</div></td></tr><tr>
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<a href="00907.html" target="topic">SYS_FS_DriveLabelGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the drive label.&nbsp;</div></td></tr><tr>
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<a href="00908.html" target="topic">SYS_FS_DriveLabelSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Sets the drive label&nbsp;</div></td></tr><tr>
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<a href="00906.html" target="topic">SYS_FS_DriveFormat</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Formats a drive.&nbsp;</div></td></tr><tr>
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<a href="00909.html" target="topic">SYS_FS_DrivePartition</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Partitions a physical drive (media).&nbsp;</div></td></tr><tr>
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<a href="00910.html" target="topic">SYS_FS_DriveSectorGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Obtains total number of sectors and number of free sectors for the specified drive.&nbsp;</div></td></tr><tr>
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<a href="00943.html" target="topic">SYS_FS_EventHandlerSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Allows a client to identify an event handling function for the file system to call back when mount/unmount operation has completed.&nbsp;</div></td></tr></table></div></div>
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c) Media Manager Functions</div>
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Name&nbsp;</div></td><td class="Element204" valign="top" width="65%">
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Description&nbsp;</div></td></tr><tr>
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<a href="01087.html" target="topic">SYS_FS_MEDIA_MANAGER_Tasks</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Media manager task function.&nbsp;</div></td></tr><tr>
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<a href="01088.html" target="topic">SYS_FS_MEDIA_MANAGER_TransferTask</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Media manager transfer task function.&nbsp;</div></td></tr><tr>
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<a href="01082.html" target="topic">SYS_FS_MEDIA_MANAGER_Read</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets data from a specific media address.&nbsp;</div></td></tr><tr>
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<a href="01085.html" target="topic">SYS_FS_MEDIA_MANAGER_SectorRead</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Reads a specified media sector.&nbsp;</div></td></tr><tr>
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<a href="01086.html" target="topic">SYS_FS_MEDIA_MANAGER_SectorWrite</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Writes a sector to the specified media.&nbsp;</div></td></tr><tr>
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<a href="01083.html" target="topic">SYS_FS_MEDIA_MANAGER_Register</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Function to register media drivers with the media manager.&nbsp;</div></td></tr><tr>
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<a href="01084.html" target="topic">SYS_FS_MEDIA_MANAGER_RegisterTransferHandler</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Register the event handler for data transfer events.&nbsp;</div></td></tr><tr>
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<a href="01078.html" target="topic">SYS_FS_MEDIA_MANAGER_DeRegister</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Function called by a media to deregister itself to the media manager. For static media, (like NVM or SD card), this &quot;deregister function&quot; is never called, since static media never gets deregistered once they are initialized. For dynamic media (like MSD), this register function is called dynamically, once the MSD media is connected.&nbsp;</div></td></tr><tr>
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<a href="01076.html" target="topic">SYS_FS_MEDIA_MANAGER_AddressGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the starting media address based on a disk number.&nbsp;</div></td></tr><tr>
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<a href="01081.html" target="topic">SYS_FS_MEDIA_MANAGER_MediaStatusGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the media status.&nbsp;</div></td></tr><tr>
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<a href="01089.html" target="topic">SYS_FS_MEDIA_MANAGER_VolumePropertyGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the volume property.&nbsp;</div></td></tr><tr>
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<a href="01077.html" target="topic">SYS_FS_MEDIA_MANAGER_CommandStatusGet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the command status.&nbsp;</div></td></tr><tr>
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<a href="01080.html" target="topic">SYS_FS_MEDIA_MANAGER_GetMediaGeometry</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Gets the media geometry information.&nbsp;</div></td></tr><tr>
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<a href="01079.html" target="topic">SYS_FS_MEDIA_MANAGER_EventHandlerSet</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Register the event handler for Mount/Un-Mount events.&nbsp;</div></td></tr></table></div></div>
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d) File System Data Types and Constants</div>
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Name&nbsp;</div></td><td class="Element204" valign="top" width="65%">
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Description&nbsp;</div></td></tr><tr>
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<a href="00912.html" target="topic">SYS_FS_ERROR</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Lists the various error cases.&nbsp;</div></td></tr><tr>
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<a href="00961.html" target="topic">SYS_FS_FILE_SEEK_CONTROL</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Lists the various modes of file seek.&nbsp;</div></td></tr><tr>
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<a href="01003.html" target="topic">SYS_FS_FSTAT</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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File System status&nbsp;</div></td></tr><tr>
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<a href="01012.html" target="topic">SYS_FS_FUNCTIONS</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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SYS FS Function signature structure for native file systems.&nbsp;</div></td></tr><tr>
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<a href="01118.html" target="topic">SYS_FS_REGISTRATION_TABLE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The sys_fs layer has to be initialized by passing this structure with suitably initialized members.&nbsp;</div></td></tr><tr>
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<a href="01121.html" target="topic">SYS_FS_RESULT</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Lists the various results of a file operation.&nbsp;</div></td></tr><tr>
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<a href="00954.html" target="topic">SYS_FS_FILE_OPEN_ATTRIBUTES</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Lists the various attributes (modes) in which a file can be opened.&nbsp;</div></td></tr><tr>
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<a href="00965.html" target="topic">SYS_FS_FILE_SYSTEM_TYPE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Enumerated data type identifying native file systems supported.&nbsp;</div></td></tr><tr>
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<a href="01046.html" target="topic">SYS_FS_HANDLE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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This type defines the file handle.&nbsp;</div></td></tr><tr>
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<a href="01047.html" target="topic">SYS_FS_HANDLE_INVALID</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Invalid file handle&nbsp;</div></td></tr><tr>
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<a href="00944.html" target="topic">SYS_FS_FILE_DIR_ATTR</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Enumerated data type identifying the various attributes for file/directory.&nbsp;</div></td></tr><tr>
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<a href="00995.html" target="topic">SYS_FS_FORMAT_MACROS</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Specifes the partitioning rule.&nbsp;</div></td></tr><tr>
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<a href="01125.html" target="topic">SYS_FS_TIME</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The structure to specify the time for a file or directory.&nbsp;</div></td></tr><tr>
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<a href="00996.html" target="topic">SYS_FS_FORMAT_PARAM</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Format parameter structure&nbsp;</div></td></tr><tr>
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<a href="00937.html" target="topic">SYS_FS_EVENT</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Identifies the possible file system events.&nbsp;</div></td></tr><tr>
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<a href="00942.html" target="topic">SYS_FS_EVENT_HANDLER</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Pointer to the File system Handler function.&nbsp;</div></td></tr><tr>
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<a href="01050.html" target="topic">SYS_FS_MEDIA_BLOCK_COMMAND_HANDLE_INVALID</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Defines the invalid media block command handle.&nbsp;</div></td></tr><tr>
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<a href="01075.html" target="topic">SYS_FS_MEDIA_HANDLE_INVALID</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Defines the invalid media handle.&nbsp;</div></td></tr><tr>
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<a href="01138.html" target="topic">_SYS_FS_VOLUME_PROPERTY</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Structure to obtain the property of volume&nbsp;</div></td></tr><tr>
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<a href="01051.html" target="topic">SYS_FS_MEDIA_BLOCK_EVENT</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Identifies the possible events that can result from a request.&nbsp;</div></td></tr><tr>
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<a href="01054.html" target="topic">SYS_FS_MEDIA_COMMAND_STATUS</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The enumeration for status of buffer&nbsp;</div></td></tr><tr>
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<a href="01060.html" target="topic">SYS_FS_MEDIA_FUNCTIONS</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Structure of function pointers for media driver&nbsp;</div></td></tr><tr>
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<a href="01090.html" target="topic">SYS_FS_MEDIA_MOUNT_DATA</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Structure to obtain the device and mount name of media&nbsp;</div></td></tr><tr>
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<a href="01095.html" target="topic">SYS_FS_MEDIA_PROPERTY</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Contains information of property of a media.&nbsp;</div></td></tr><tr>
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<a href="01102.html" target="topic">SYS_FS_MEDIA_STATE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The enumeration for state of media.&nbsp;</div></td></tr><tr>
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<a href="01108.html" target="topic">SYS_FS_MEDIA_STATUS</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The state of media.&nbsp;</div></td></tr><tr>
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<a href="01111.html" target="topic">SYS_FS_MEDIA_TYPE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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The enumeration for type of media.&nbsp;</div></td></tr><tr>
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<a href="01049.html" target="topic">SYS_FS_MEDIA_BLOCK_COMMAND_HANDLE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Handle identifying block commands of the media.&nbsp;</div></td></tr><tr>
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<a href="01059.html" target="topic">SYS_FS_MEDIA_EVENT_HANDLER</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Pointer to the Media Event Handler function.&nbsp;</div></td></tr><tr>
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<a href="01073.html" target="topic">SYS_FS_MEDIA_GEOMETRY</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Contains all the geometrical information of a media device.&nbsp;</div></td></tr><tr>
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<a href="01074.html" target="topic">SYS_FS_MEDIA_HANDLE</a>&nbsp;</div></td><td class="Element206" valign="top" width="65%">
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Handle identifying the media registered with the media manager.&nbsp;</div></td></tr><tr>
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